Letter spacing and new tagging system

New

• Tagging system.

• Letter spacing.

• Convert Group to Solo (right-click menu when a group is selected in the hierarchy).

• Added trackpad pinch-to-zoom to animation timelines and value graph editor.

• Right-click on file in the file browser to download a previous revision.

Fixes and improvements

• Improved the Revision History UI in the editor.

• Enabled shift-key snapping with bezier handles in value graph editor for value types we missed in a previous release.

• Added automatic scrolling when using page up/page down (Windows) or Fn+up/down arrow keys (Mac) when cycling through animations in the Animations panel.